Abstract
Dye diffusion thermal transfer printing involves the transport of dyes from a dye-donor film to a dye-acceptor film at high temperature, well above the glass transition of most amorphous polymers. A model has been developed for the transport of a fixed dye solute from a common dye-donor. Using the solution-diffusion model of permeability as a starting point, equations have been developed to correlate solute permeability with dye and dye-acceptor polymer structural characteristics. In this analysis, diffusivity is controlled by polymer T g, whereas solubility is controlled by the balance of endothermic physical forces and exothermic specific interactions between dye and dye-acceptor polymer.
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